Authorea (Authorea),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Aug. 3, 2023
China’s
low
nitrogen
fertilizer
use
raises
agricultural
prices
and
environmental
dangers.
High-carbon
with
biochar
could
help
sequester
carbon.
was
tested
on
roasted
tobacco
cultivation
in
Chenzhou.
No-nitrogen
treatment
assessed
consumption
economic
benefits.
Fertilizer-only
cake
treatments,
substituting
13%
26%
of
high
carbon-based
fertilizer,
yielded
the
following
results:
Replacing
N
high-carbon
increased
dry
matter
accumulation,
utilization,
agronomic
efficiency,
application
production
investment
ratios
to
493.97
g-plant-1,
32.39%,
137.43
kg-kg-1,
65168.31
yuan-hm-2,
8.97
yuan-yuan-1.
484.46
34.46%,
148.37
72408.74
8.04
yuan-yuan-1
at
replacement.
boosted
efficiency
more
than
fertilizer.
The
ratio
chemical
organic
improved
plant
growth
by
improving
utilization.
Using
only
nitrogen,
tobacco’s
distribution
26%,
27%,
23%,
24%
roots,
stems,
leaves,
flowers.
Partial
replacement
or
stems
from
25%
30%,
slightly
reducing
roots
leaves.
Chenzhou
tobacco-rice
rotation
system
optimizes
It
outperforms
A
a
ratio.
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(2)
Published: Feb. 1, 2024
Abstract
Maintaining
or
even
increasing
crop
yields
while
reducing
nitrous
oxide
(N
2
O)
emissions
is
necessary
to
reconcile
food
security
and
climate
change,
the
metric
of
yield‐scaled
N
O
emission
(i.e.,
per
unit
yield)
at
present
poorly
understood.
Here
we
conducted
a
global
meta‐analysis
with
more
than
6000
observations
explore
variation
patterns
controlling
factors
for
maize,
wheat
rice
associated
potential
mitigation
options.
Our
results
showed
that
average
across
all
available
data
followed
order
(322
g
Mg
−1
,
95%
confidence
interval
[CI]:
301–346)
>
maize
(211
CI:
198–225)
(153
144–163).
Yield‐scaled
individual
crops
were
generally
higher
in
tropical
subtropical
zones
temperate
zones,
also
trend
towards
lower
intensities
from
low
high
latitudes.
This
was
better
explained
by
climatic
edaphic
fertilizer
management,
their
combined
effect
predicted
70%
variance.
Furthermore,
our
analysis
significant
decrease
use
efficiency
production
systems
cereal
>10
ha
(maize),
6.6
(wheat)
6.8
(rice),
respectively.
highlights
indicators
can
be
used
as
valuable
proxies
reconciling
trade‐offs
between
mitigation.
For
three
major
staple
crops,
fertilization
up
30%,
optimizing
timing
placement
application
using
enhanced‐efficiency
fertilizers
significantly
reduced
similar
yields.
data‐driven
assessment
provides
some
key
guidance
developing
effective
targeted
adaptation
strategies
sustainable
intensification
production.
Excessive
long-term
application
of
synthetic
nitrogen
has
resulted
in
serious
environmental
issues
vulnerable
ecosystems
and
contributed
to
global
warming.
The
partial
replacement
N
fertilizer
with
manure
croplands
provides
an
alternative
agronomic
strategy
mitigate
pressure
on
the
ecological
environment.
Therefore,
this
study,
we
aimed
evaluate
effects
longer-term
substitution
soil
greenhouse
gas
emissions,
carbon
footprint
(CF),
budget.
To
end,
established
four
treatments:
no
(control,
N0),
chemical
(180
kg
ha-1,
N180),
replaced
aged
cow
at
ratios
40%
(OS40)
60%
(OS60).
Each
treatment
was
applied
sorghum
under
drip
irrigation
plastic
mulching
over
two
growing
seasons.
Greenhouse
topsoil
organic
storage,
CF,
budget,
were
assessed
using
life
cycle
assessments
balance
calculations.
results
showed
that,
compared
N180,
OS40
OS60
increased
cumulative
CO2
indirect
CO2-eq
emissions
reduced
N2O
CH4
emissions.
Soil
storage
net
primary
productivity
significantly
enhanced
those
whereas
these
variables
not
different
between
OS60.
ecosystem
budget
increasing
ratio.
A
(108
ha-1
inorganic
fertilizer,
72
fertilizer)
selected
as
a
suitable
candidate
for
reducing
CF
promoting
enrichment
salt-affected
soils.
Agronomy,
Journal Year:
2025,
Volume and Issue:
15(2), P. 288 - 288
Published: Jan. 24, 2025
Nitrous
oxide
(N2O)
is
a
major
greenhouse
gas
(GHG)
responsible
for
global
warming.
Improper
fertilization
in
agricultural
fields,
particularly
excessive
nitrogen
(N)
application,
accelerates
soil
N2O
emissions.
Though
partial
substitution
with
organic
fertilizer
has
been
implemented
to
mitigate
these
emissions,
the
effect
on
perennial
systems,
such
as
tea
plantations,
remains
largely
unexplored.
Therefore,
present
study
monitored
emissions
year
plantation
South
China
under
following
treatments:
no
N
(control,
CK),
chemical
alone
(CF),
replacing
40%
of
(CF
+
OF),
and
(OF).
Our
results
showed
that
annual
cumulative
from
ranged
1.03
3.43
kg
N2O-N
ha−1.
The
yield-scaled
(YSNE),
emission
factor
(EF)
were
highest
CF
OF
treatment
but
lowest
treatment.
Further
analysis
revealed
fertilization,
mainly
increased
ammonium
(NH4+-N)
nitrate
(NO3−-N)
levels
by
182–387%
195–258%,
respectively,
yields
120–170%.
However,
yield
decreased
gradually
increasing
substitution.
These
prove
complete
reduces
suggest
adopting
an
appropriate
rate
optimal
effect.
random
forest
(RF)
modeling
identified
water-filled
pore
space
(WFPS;
20.27%
total
variation),
temperature
(Tsoil;
19.29%),
NH4+-N
(18.27%)
key
factors
significantly
contributing
changes
flux.
findings
provide
theoretical
foundation
optimizing
regimes
sustainable
production
mitigation.
Agronomy,
Journal Year:
2025,
Volume and Issue:
15(2), P. 380 - 380
Published: Jan. 31, 2025
The
rate
of
chemical
fertilizers’
utilization
by
crops
does
not
exceed
40%.
Environmental
pollution
and
resource
waste
caused
the
excessive
application
fertilizers
have
led
to
increased
interested
in
using
organic
as
replacements
for
ones.
present
study
investigated
impact
combined
on
growth
nutrient
efficiency
highland
barley
(Hordeum
vulgare
L.).
Compared
100%
(OFR0),
substitution
fertilizer
with
40%
(OFR40)
resulted
a
significant
increase
root
length
4%
improved
absorption
capacity.
crop
yields
at
harvest
were
diminished
group
compared
OFR0
treatment
group,
while
simultaneously
achieving
60%
reduction
application.
However,
complete
(OFR100)
lower
yield.
This
suggests
that
appropriate
proportions
replacement
can
maintain
yield
increasing
enhancing
crop’s
In
order
elucidate
mechanisms
which
modulates
efficiency,
transcriptomic
metabolomic
analysis
revealed
concentration
increased,
differentially
expressed
genes
(DEGs)
accumulated
metabolites
(DAMs)
shifted
from
secondary
metabolite
synthesis
toward
nitrogen
metabolism.
addition,
gene
expression
enzymatic
activity
NR
(nitrate
reductase),
GS
(glutamine
synthetase),
GOGAT
oxoglutarate
aminotransferase)
(key
metabolism
pathways)
significantly
enhanced
OFR40
group.
study’s
omics-based
approach
demonstrates
use
enhances
through
an
key
activities
within
metabolic
pathways.
synergistic
effect
only
maintains
but
also
reduces
reliance
fertilizers,
offering
sustainable
strategy
agricultural
production.